Warp stop-motion for looms.



R. CROMPTON.

WARP STOP MOTION FOR LOOMS.

APPLICATION FILED NOV. 18- I915.

Patvntwl June 25, 1918.

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WARP STOP MOTION FOR LOOMSI 0 4 6 a n, 5 2m om/w! my 07 Mi 1% APPLICATION FILED NOV. 18. I9I5.

Randal 6y un 0 a 4 7 9 W E n m II 4 m a m #m II "0 6 ,0 W I 2 2 I HHPU L H u V VI .1 I w m g RANDOLPH CROMPTON, 0F CHATHAM, MASSACHUSETTS.

WARP'STOP-MOTION FOR LOOMS.

Specification of Letters Patent.

Patented June 25, 1918.

Application filed November 18, 1915. Serial No. 62,235.

To all whom it may concern:

Be it known that I, RANDOLPH CRoMr'mN, a citizen of the United States, and a resident of Chatham, in the county of Barnstable and State of Massachusetts, have invented an Improvement in \Varp Stop-Motions for Looms, of which the following description, in connection with the accompanying drawings, is a specification, like characters on the drawings representing like parts.

This invention relates to stop motions for textile machines and particularly to warp stop motions for looms.

In order that the principle thereof may be readily understood, I have disclosed a single embodiment thereof in the accompanying drawing, wherein- Figure 1 is a front elevation of a loom having my invention applied thereto, many parts being omitted for the sake of clearness;

Fig. 2 is a detail in front elevation of a portion of the stopping mechanism;

Fig. 3 is a transverse section of the structure shown in Fig. 2;

Fig. 4 is a transverse section taken through certain movable rods upon the harness frame;

Fig. 5 is a front elevation of a portion of the harness frame having my invention applied thereto, the harness being up;

Fig. 6 is a similar view, the harness being down;

Fig. 7 is a transverse section of the construction shown in Fig. 5; and

Fig. 8 is a transverse section of the construction shown in Fig. 6.

My invention relates to stopping instrumentalities for textile apparatus, but in its preferred embodiment it is a warp stop motion for looms and without limiting my invention thereto, I shall proceed to describe the same with reference to a loom.

Preferably my invention is embodied in a loom of the general character shown in my Patents Nos. 1,142,751 and 1,142,752, and I shall describe the same with reference thereto without, however, limiting the same to such application.

Referring more particularly to the drawings, I have therein represented a conventional type of loom having side frames 1 and 2, a breast beam, and a lay 3 for the reception of the shuttle, These parts may be of any suitable or desired. construction,

and other parts of the loom commonly employed are omitted for clearness of illustration. My invention may be employed in connection with any desired number of beddle frames 01' supports. I have herein represented two such frames. Each frame is provided with upper and lower cross bars 4, 5 and connecting uprights rigid therewith, one of which is indicated at 6, thus forming a rectangular frame. Each frame is pro vided near its upper end with a cross rod 7 fixedly positioned and around which the heddles are passed, two of the latter being indicated at 8 and 9 in Fig. 5. These heddles are of the duplex character shown in my aforesaid patents; the method of operation thereof is fully set forth therein, and need not be herein more fully described. Each of said heedles is provided with a heddle eye 10 and with an extension 11 which is preferably of loop form and which passes under the stop rod 12 mounted for vertical movement in the framing of the loom and operatively associated with the stopping mechanism proper of the loom, as set forth in said patents and which need not be more fully herein described. While said looped extensions may be of any suitable construction and may or may not be attached to the rod 12, I preferably connect one portion thereof to one heddle and the other portion thereof to the next adjacent heddle to the right or to the left. In F ig. 5, I have represented said looped extension 11 as connected at its upper ends to the two duplex heddles 8 and 9.

In each heddle frame I mount two vertically movable cross rods or members 13 14. Said rods or members are normally held down by means of sets of coiled springs 15,

16 respectively, herein shown as connected to said rods or members by links 17, 18, and as connected to the lower cross bar 5 of the heddle frame. Both of said rods or members may be moved upwardly against the tension of said spring 15, 16 as indicated in Fig. 6. The upper rod or member 13 is provided upon its lower edge with a recess 19 receiving therein the strip 20 of rubber, felt or other suitable material, by which the heddles may be suitably clamped, it being evident from Figs. 7 and 8 that each duplex heddle is crossed between the rods or membore 13 and 14, so that when said rods or ment thereof is prevented.

members are in the position shown in Fig. 5, all the heddles are clamped and move- This action occurs when the harness 15 up, and in accordance with my invention I provide means for releasing the clamped portions of the heddles when theharness frame is lowered.

While this result may be effected in any suitable manner, I have, in the disclosed embodiment of my invention, provided the upper rod 13 with looped straps 19' at each end thereof. The have angular portions receiving adjustab e. set screws 20, 20, means of thenuts 21 may be set effect the releasing movement at' sired time.

In the downward movement of the harness or heddle frame, the set screws 20 thereof are adapted to contact with a cross or stirrups said straps therein the which by so as to any debar 22 fixedly mounted in the loom frame and preferably in the flexible uprights 23, 23 thereof. The result of such contact is relatively to lift the cross bar or member 13, as indicated in Fig. 6, or rather to prevent further downward movement thereof, and when the looped straps 19 contact with the lower cross member 14, the latter is relatively lifted until it in turn contacts with stop pins 25 upon the harness frame. This prevents further relative lifting movement of the cross bar or member 14, and prevents further downward movement of the heddle frame. The relative lifting movements of the cross bars or members 13 and 14 are such as sufficiently to separate said members 13 and 14, and hence to un clamp the duplex heddles as indicated in Fig. 8. Such action occurs upon the downward movement of each harness frame.

When the heddles bf a harness are clamped as is the case when the harness is up, even though a thread end has broken, there is no relative movement of the parts of the duplex heddle pertaining thereto (such as is necessary to stop the loom), but when the harness frame containing the duplex heddle having a broken warp or thread end is lowered then all the harnesses of that frame are released and said heddle containing the broken warp end is permitted to function and to stop the loom through the lifting of the cross rod 12, such lifting being effected by the lifting of the harness after clamping the duplex heddle out of its normal weaving position. When the harnesses of a frame are released subsequent to the breaking of a warp the duplex heddle pertaining thereto functions in the manner fully described in my above mentioned Patents 1,142,751, and 1,142,752.

The rods 13 and 14 are mounted to slide in any suitable manner upon the upright members of the harness frames and preferably to this end the said rods or members are provided The bar 22 which coacts with the set screw 20 constitutes an arrester which causes the relative lifting movement of the cross rods or members 13, 14. The lifting of said. cross rods or members relieves the warp end, the mate of which is broken, of substantially all strain, and hence the stopping motion is effected without substantial strain upon the said unbroken warp end.

The ascent of the whole harness frame allows the two cross rods or members 13 or 14 to snap together and to clamp or bite the several duplex heddles including the heddle containing the broken warp end. Thus the harness motion is the actual lifting instrumentality, through which the clamping and releasing action of the cross bar or member 13, 14 is brought about. The said bar or arrester 22 is preferably supported by the flexible upright 23, 23 in any suitable manner as, for example, by passing the said bar through said upright and applying nuts upon the outer ends thereof.

The purpose of connecting the extension or loop 11 to two preferably adjacent duplex heddles is to lighten still further the with forked ends .to embrace the upright members of the heddle frames.

work to be done by the mate .of the broken invention I have represented the employ-' ment of duplex heddles,'1 desire it to'be understood that I am not in all aspects of my invention limited thereto, inasmuch as certain principles and purposes of my invention may be practised with shifting heddles of other types.

Having thus described 7 one illustrative embodiment of my invention, I desire it to be understood that although specific terms are employed, they are used in a generic and descriptive sense and not for purposes of limitation, the scope of the invention being set forth in the following claims.

Claims:

1. Loom stopping mechanism comprising in combination, a heddle frame having supporting cross members, a series of double heddle devices of loop form supported upon said cross members for movement thereabout, and means operatively connected with said heddle frame for clamping 'said heddle devices through movement of said frame.

2. Loom stopping mechanism comprising in combination, a heddle frame havin supporting cross members, a series of ouble heddle devices of loop form supported upon said cross members for movement therein one direction.

4. Loom stopping mechanism comprising in combination, a heddle frame having supporting cross members, a series of double heddle devices of loop form supported upon said cross members for movement thereabout, means operatively connected with said heddle frame for clamping said heddle devices, and means also operatively connected with said frame for releasingsaid heddle devices.

5. Loom stopping mechanism comprising in combination, a heddle frame having sup-v porting cross members, a series of double heddle devices of loop form supported upon said cross members for movement thereabout, means operatively connected with said heddle frame for clamping said heddle devices upon movement of the heddle frame in one direction, and means also operatively connected with said frame for releasing said heddle devices upon movement of the heddle frame in the opposite direction.

6. Loom stopping mechanism comprising in combination, a heddle frame having upper and lower support'ng cross members, a series of double heddle devices of loop form supported upon said cross members for movement thereabout, and means for periodically moving the lower cross member relative to the upper cross member.

7. Loom stopping mechanism comprising in combination, a heddle frame having upper and lower supporting cross members, a series of double heddle devices of loop form supported upon said cross members for movement thereabout, and means for periodically imparting rising and falling movements to said lower cross member relative to the upper cross member.

8. Loom stopping mechanism comprising in combination, a heddle frame having an upper supporting cross member and a pair of lower cross members, and a series of double heddle devices of loop form supported upon said uppermost cross member and supported for movement thereabout and passed between said pair of lower cross members and means for relatively moving the members of said pair of lower cross members.

9. Loom stopping mechanism comprising in combination a heddle frame having an upper supporting cross member and a pair 0 lower cross members, a series of double heddle devices of loop form supported upon said uppermost cross member and passed between said pair of lower cross members, and means to impart relative clamping movement to said lower cross members.

10. Loom stopping mechanism comprising in combination a heddle frame having an up er supporting cross member and a pair of ower clamping cross members, a series of double heddle devices of loop form supported upon said uppermost cross member and passed between said pair of.lower clamping cross members, and means to impart rising and falling movements to said lower cross members.

11. Loom stopping mechanism comprising in combination, a heddle frame having sup porting cross members, a series of double heddle devices of loop form supported upon said cross members for movement thereabout, and means acting periodically to clamp said heddle devices.

12. Loom stopping mechanism comprising in combination, a heddle frame having supporting cross members, a series of double heddle devices supported upon said cross members for movement thereabout, and an extension joining a pair of said heddle devices.

13. Loom stopping mechanism comprising in combination a heddle frame having supporting cross members, a series of double heddle devices supported upon said cross members for movement thereabout, an extension joining a pair of said heddle devices,

and a stopping device received by said extension.

14. Loom stopping mechanism comprising in combination a heddle frame having supporting cross members, a series of double heddle devices supported upon said cross members for movement thereabout, and a looped extension connecting adjacent heddle devices.

15. Loom stopping mechanism comprising in combination a heddle frame having supporting cross members, a series of double heddle devices supported upon said cross members for movement thereabout, and a looped extension connecting the lower portions of adjacent heddle devices.

16. Loom stopping mechanism comprising in combination a heddle frame having supporting cross members, a series of double heddle devices supported upon said cross members for movement thereabout, a. looped extension connecting the lower portions of adjacent heddle devices, and a stopping device received by said looped extensions.

17. In a loom, a shiftable heddle, a heddle III frame wherein it is suitably mounted, means to shift said frame, means to hold said heddle in different positions in said frame, and-means to stop the loom on the shifting of said heddle and said heddle frame.

18; In a loom, a shiftable heddle, a heddle frame wherein the same is mounted, means to shift said frame, means to hold said heddle in different positions in said frame and the shifting of the heddle relative to the frame.

21. Loom stopping mechanism comprising in combination, a heddle frame having supporting cross members, a series of double heddle devices of loop form supported upon said cross members for movement thereabout, and coiiperating means to'clamp said heddle devices by movement of the frame.

- about, and means operatively connected With; said heddle frame for clamping said heddle 22. Loom stopping mechanism comprising in combination, a heddle frame having supporting cross members, a series of double heddle devices of loop form supported upon said cross members for movement theredevices by the shifting action of the heddle frame.

23. In a loom, a heddle frame, aidouble heddle device of looped form mounted thereon, means to shift said frame, means to hold said heddle device in different positions the frame, and means to stop the loom upon the shifting of the frame and the shifting of the heddle device relative to the frame.

24. In a loom, a heddle frame having supportingcross members, a series of double heddle devices of loop form supported upon said cross members for movement thereabout, means to shift said frame, means to hold said heddle devices in different positions in the frame, and means to stop the loom upon the shiftin of the frame, and the shifting of a hedd e device relative to said frame.

25. Loom stopping mechanism, comprising in combination a heddle frame having upper and lower supporting cross members, a series of double heddle devices of loop form supported upon said cro'ss members for movement thereabout, and means for periodicall moving the lower cross member into clamping and nonclamping positions.

26. Loom stopping mechanism,;comprising in combination a heddle frame having upper and lower supporting cross members, a series of double heddle devices of loop form supported upon said cross members for movement thereabout, and means for periodically moving one of said'cross members relative to the other.

27. Loom stopping mechanism, comprising in combination a heddle frame having upper and lower supporting cross members,

a series of double heddle devices of loop form supported upon said cross members for movement thereabout, and means for periodically moving one of said cross members relative to the other into clamping and nonclamping positions.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing Witnesses,

RANDOLPH 'CROMPTON.

Witnesses:

IRVING U. TOWNSEND, ROBERT E. KAMMLER. 

